Spare tea possibly being split (8)
I believe the answer is:
separate
'being split' is the definition.
(I've seen this before)
'spare tea possibly' is the wordplay.
'possibly' indicates an anagram.
'spare'+'tea'='sparetea'
'sparetea' anagrammed gives 'SEPARATE'.
(Other definitions for separate that I've seen before include "Standing apart" , "Unconnected" , "Divide, part" , "Distinct; divide" , "Dinstinct or discrete" .)